Recent Advances on Transition Metal Dichalcogenides for Electrochemical Energy Conversion

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(38)

Published: Aug. 18, 2021

Abstract Transition metal dichalcogenides (TMDCs) hold great promise for electrochemical energy conversion technologies in view of their unique structural features associated with the layered structure and ultrathin thickness. Because inert basal plane accounts majority a TMDC's bulk, activation sites is necessary to fully exploit intrinsic potential TMDCs. Here, recent advances on TMDCs‐based hybrids/composites greatly enhanced activity are reviewed. After summary synthesis TMDCs different sizes morphologies, comprehensive in‐plane strategies described detail, mainly including in‐plane‐modification‐induced phase transformation, surface‐layer modulation, interlayer modification/coupling. Simultaneously, underlying mechanisms improved activities highlighted. Finally, strategic evaluation further research directions featured. This work would shed some light future design trends functional materials energy‐related applications.

Language: Английский

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Distance Synergy of MoS₂‐Confined Rhodium Atoms for Highly Efficient Hydrogen Evolution

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 59(26), P. 10502 - 10507

Published: March 30, 2020

Perturbing the electronic structure of MoS2 basal plane by confining heteroatoms offers opportunity to trigger in-plane activity for hydrogen evolution reaction (HER). The key challenge consists inducing optimum HER controlling type and distribution confined atoms. A distance synergy -confined single-atom rhodium is presented, leading an ultra-high at S sites adjacent rhodium. By optimizing between Rh atoms, ultra-low overpotential 67 mV achieved a current density 10 mA cm-2 in acidic solution. Experiments first-principles calculations demonstrate unique atoms tuning reactivity neighboring which presents volcanic trend with inter-rhodium distance. This study provides new strategy tailor surface via modulating single

Language: Английский

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Enrichment of reactants and intermediates for electrocatalytic CO₂reduction

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(13), P. 4343 - 4380

Published: Jan. 1, 2023

The electrocatalytic carbon dioxide reduction reaction (CO2RR) presents a sustainable route to convert renewable electricity value-added fuels and feedstocks in the form of chemical energy. However, selectivity rate conversion CO2 desirable carbon-based products, especially multicarbon remain below requirement for its implementation at commercial scale, which primarily originates from inadequate reactants intermediates near catalytic surfaces during CO2RR. enrichment provides one coping guidelines improve CO2RR performance by accelerating improving product selectivity. Herein, we discuss strategies achieve through catalyst design, local microenvironment modulation, electrolyte regulation, electrolyzer optimization. structure properties are first presented, showing necessity feasibility enriching intermediates. Next, influence effect on electrolysis, i.e., selectivity, comprehensively discussed. Then, design micrometer scale atom including wettability morphology surface modification, tandem construction, as well engineering, is highlighted implement Catalyst restructuring process impact also Subsequently, modulating high utilization produce products reviewed. After that, insights into regulation provided investigating various electrolytes, aqueous solutions, organic solvents, ionic liquids. Additionally, key role optimization promoting considered. We end review outlining remaining technological challenges providing feasible suggestions aimed directing future employment propel practical electrolysis technology.

Language: Английский

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Charge self-regulation in 1T'''-MoS2 structure with rich S vacancies for enhanced hydrogen evolution activity

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Oct. 10, 2022

Active electronic states in transition metal dichalcogenides are able to prompt hydrogen evolution by improving absorption. However, the development of thermodynamically stable hexagonal 2H-MoS2 as catalyst is likely be shadowed its limited active state. Herein, charge self-regulation effect mediated tuning Mo-Mo bonds and S vacancies revealed metastable trigonal MoS2 (1T'''-MoS2) structure, which favarable for generation boost reaction activity. The optimal 1T'''-MoS2 sample exhibits a low overpotential 158 mV at 10 mA cm-2 Tafel slope 74.5 dec-1 acidic conditions, far exceeding counterpart (369 137 dec-1). Theoretical modeling indicates that boosted performance attributed formation massive induced defective with rich vacancies.

Language: Английский

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Understanding Single-Atom Catalysis in View of Theory

JACS Au, Journal Year: 2021, Volume and Issue: 1(12), P. 2130 - 2145

Published: Nov. 22, 2021

In the past decade, isolated single atoms have been successfully dispersed on various substrates, with their potential applications being intensively investigated in different reactions. While essential target of research single-atom catalysis is precise synthesis stable catalysts (SACs) clear configurations and impressive catalytic performance, theoretical investigations also played important roles identifying active sites, revealing mechanisms, establishing structure–activity relationships. Nevertheless, special attention should still be paid works to particularity SACs. this Perspective, we will summarize progress made understanding rich phenomena catalysis. We focus determination local structures SACs via comparison between experiments simulations, discovery distinctive mechanisms induced by multiadsorption, synergetic effects, dynamic evolutions, name a few, proposal criteria for theoretically designing SACs, extension original concepts hope that Perspective inspire more in-depth thinking future studies

Language: Английский

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MOFs‐Derived Carbon‐Based Metal Catalysts for Energy‐Related Electrocatalysis

Small, Journal Year: 2021, Volume and Issue: 17(22)

Published: Jan. 18, 2021

Abstract Electrochemical devices, as renewable and clean energy systems, display a great potential to meet the sustainable development in future. However, well‐designed highly efficient electrocatalysts are technological dilemmas that retard their practical applications. Metal–organic frameworks (MOFs) derived exhibit tunable structure intriguing activity have received intensive investigation recent years. In this review, progress of MOFs‐derived carbon‐based single atoms (SAs) metal nanoparticles (NPs) catalysts for energy‐related electrocatalysis is summarized. The effects synthesis strategy, coordination environment, morphology, composition on catalytic highlighted. Furthermore, these SAs NPs applications (hydrogen evolution reaction, oxygen reduction carbon dioxide nitrogen reaction) overviewed. Finally, some current challenges foresighted ideas presented.

Language: Английский

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N-doped carbon nanotube arrays on reduced graphene oxide as multifunctional materials for energy devices and absorption of electromagnetic wave

Carbon, Journal Year: 2021, Volume and Issue: 177, P. 216 - 225

Published: Feb. 25, 2021

Language: Английский

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Electrocatalytic Hydrogen Oxidation in Alkaline Media: From Mechanistic Insights to Catalyst Design

ACS Nano, Journal Year: 2022, Volume and Issue: 16(4), P. 5153 - 5183

Published: April 14, 2022

With the potential to circumvent need for scarce and cost-prohibitive platinum-based catalysts in proton-exchange membrane fuel cells, anion-exchange cells (AEMFCs) are emerging as alternative technologies with zero carbon emission. Numerous noble metal-free have been developed excellent catalytic performance cathodic oxygen reduction reaction AEMFCs. However, anodic hydrogen oxidation (HOR) still rely on metal materials. Since kinetics of HOR alkaline media is 2-3 orders magnitude lower than that acidic media, it a major challenge either improve or develop high-performance catalysts. Additionally, mechanisms not yet clear under debate, further hampering design electrocatalysts. Against this backdrop, review starts prevailing theories basis diverse activity descriptors, i.e., binding energy theory bifunctional theory. The principles recent advances employing aforementioned then summarized. Next, strategies progress improving antioxidation capability catalysts, thorny issue which has received sufficient attention, discussed. Moreover, significance correlating computational models real catalyst structure electrode/electrolyte interface emphasized. Lastly, remaining controversies about well challenges possible research directions field presented.

Language: Английский

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Element‐Doped Mxenes: Mechanism, Synthesis, and Applications

Small, Journal Year: 2022, Volume and Issue: 18(25)

Published: May 9, 2022

Heteroatom doping can endow MXenes with various new or improved electromagnetic, physicochemical, optical, and structural properties. This greatly extends the arsenal of materials their potential for a spectrum applications. article comprehensively critically discusses syntheses, properties, emerging applications growing family heteroatom-doped materials. First, strategies, synthesis methods, theoretical simulations high-performance are summarized. In order to achieve materials, mechanism atomic element from three aspects lattice optimization, functional substitution, interface modification is analyzed summarized, aiming provide clues developing controllable synthetic routes. The mechanisms underlying advantageous uses energy storage, catalysis, sensors, environmental purification biomedicine highlighted. Finally, future opportunities challenges study application multifunctional presented. work could open up prospects development MXenes.

Language: Английский

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Space‐Confined Metal Ion Strategy for Carbon Materials Derived from Cobalt Benzimidazole Frameworks with High Desalination Performance in Simulated Seawater

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(23)

Published: March 29, 2023

Various metal ions with different valence states (Mg2+ , Al3+ Ca2+ Ti4+ Mn2+ Fe3+ Ni2+ Zn2+ Pb2+ Ba2+ Ce4+ ) are successfully confined in quasi-microcube shaped cobalt benzimidazole frameworks using a space-confined synthesis strategy. More importantly, series of derived carbon materials that confine obtained by high-temperature pyrolysis. Interestingly, the exhibited electric double-layer and pseudocapacitance properties because presence various states. Moreover, additional within may create new phases, which can accelerate Na+ insertion/extraction thus increase electrochemical adsorption. Density functional theory results showed Ti exhibit enhanced resulting from characteristic anatase crystalline phases TiO2 . The Ti-containing have an impressive desalination capacity (62.8 mg g-1 capacitive deionization (CDI) applications high cycling stability. This work provides facile synthetic strategy for confinement metal-organic supports further development seawater CDI.

Language: Английский

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